378663138 has 48 divisors (see below), whose sum is σ = 948205440. Its totient is φ = 106970688.

The previous prime is 378663107. The next prime is 378663139. The reversal of 378663138 is 831366873.

378663138 is a `hidden beast` number, since 3 + 7 + 8 + 6 + 631 + 3 + 8 = 666.

378663138 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 378663093 and 378663102.

It is not an unprimeable number, because it can be changed into a prime (378663139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5670 + ... + 28097.

It is an arithmetic number, because the mean of its divisors is an integer number (19754280).

Almost surely, 2^378663138 is an apocalyptic number.

378663138 is an abundant number, since it is smaller than the sum of its proper divisors (569542302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

378663138 is a wasteful number, since it uses less digits than its factorization.

378663138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33871 (or 33868 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 378663138 is about 19459.2686912946. The cubic root of 378663138 is about 723.4652515292.

The spelling of 378663138 in words is "three hundred seventy-eight million, six hundred sixty-three thousand, one hundred thirty-eight".